diff --git a/packages/lightning.xml b/packages/lightning.xml
index c85ad95..59e7c88 100644
--- a/packages/lightning.xml
+++ b/packages/lightning.xml
@@ -3,7 +3,7 @@
 <packages>
     <package id="lightning"
              name="Calendrier Lightning"
-             revision="19"
+             revision="20"
              reboot="false"
              priority="10">
 
@@ -12,7 +12,7 @@
         <!-- Et bien sur, Thunderbird aussi est nécessaire ;-) -->
         <depends package-id="thunderbird" />
 
-        <variable name="PKG_VERSION" value="4.7" />
+        <variable name="PKG_VERSION" value="4.7.4" />
         <variable architecture="x86" name="INSTALL_PATH" value="%PROGRAMFILES%\Mozilla Thunderbird\distribution\bundles\lightning" />
         <variable architecture="x64" name="INSTALL_PATH" value="%PROGRAMFILES(x86)%\Mozilla Thunderbird\distribution\bundles\lightning" />
 
diff --git a/softwares/lightning-4.7-sm+tb-windows.xpi b/softwares/lightning-4.7.4-sm+tb-windows.xpi
similarity index 86%
rename from softwares/lightning-4.7-sm+tb-windows.xpi
rename to softwares/lightning-4.7.4-sm+tb-windows.xpi
index 69e2162..3636bf6 100644
Binary files a/softwares/lightning-4.7-sm+tb-windows.xpi and b/softwares/lightning-4.7.4-sm+tb-windows.xpi differ